Telecom signal detector



FIG. 1 is a perspective view of a design for a telecom signal detector.

FIG. 2 is a top view.

FIG. 3 is a bottom view.

FIG. 4 is a side view.

FIG. 5 is a front view; and,

FIG. 6 is a rear view. 

The ornamental design for a telecom signal detector, substantially as shown. 